官方提供@yunTaoScripts Ansible 过滤器和插件 🔥🔥

过滤器

default

如果cc 没定义打印None，aa，bb定义了打印原来的值

vars:
  aa: 1
  bb:
tasks:
- name: xxx
  debug: msg="{{cc| default('None') }}"

数字操作

• int 强制类型转换

debug: msg="{{1+ ('2'| int) }}"

• float 强制类型转换

debug: msg="{{1+ ('2'| float) }}"

• abs 绝对值

debug: msg="{{-5 ｜ abs}}"

• round 四舍五入

debug: msg="{{4.5 ｜ round}}"

字符操作

• 转化为字符串

debug: msg="{{4.6｜ string}}"

• 大写转化

debug: msg="{{tom｜ upper}}"

• 小写转化

debug: msg="{{tom｜ lower}}"

• 首字母转化

debug: msg="{{tom｜ capitalize}}"

• 字符加密

 debug: msg="{{'hfsah' | hash('md5') }}"
 debug: msg="{{'hfsah' | hash('sha1') }}"
 debug: msg="{{'hfsah' | password_hash('sha512') }}"

• 正则匹配和替换

---
- name: this is for test
  hosts: localhost
  vars:
    a: 'afd 1.2.3.4 fdssa'
  tasks:
  - name: print date
    debug:
      msg: "{{a| regex_findall('\\b[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\b')}}"
  - name: print date
    debug:
      msg: "{{a|regex_replace('\\.','X')}}"
  - name: print date
    debug:
      msg: "{{a| regex_findall('\\b(?:[0-9]{1,3}\\.){3}[0-9]{1,3}\\b')}}"                             

正则分组

？： 代表不要看作分组，否则只打印分组内的信息，只显示第三组信息

列表操作

vars:
  list: [4,42,1,44,999]
tasks:
- name: xxx
  debug: msg="{{list | max }}"
  debug: msg="{{list | min }}"
  debug: msg="{{list | length }}"
  debug: msg="{{list | sort }}"
  debug: msg="{{list | sum }}"
  debug: msg="{{list | shuffle }}"
  debug: msg="{{list | unique }}"
  debug: msg="{{list | to_yaml }}" # 列表转化为字符串

字典操作

---
- name: this is for test
  hosts: localhost
  vars:
    mydict:
      a: 1
      b: 2
      c: 3
  tasks:
  - name: print info
    debug:
      msg: "{{item.key}}====={{item.value}}"
    with_dict: "{{mydict}}"
  - name: print dict2item
    debug:
      msg: "{{item.key}}====={{item.value}}"
    loop: "{{mydict|dict2items}}"

插件

lookup file

把整个文件内容获取。

vars:
  aa: "{{lookup('file','/etc/hosts')}}"

query lines

将文件按行转化为列表

vars:
  aa: "{{query('lines', 'cat /etc/hosts')}}"
tasks:
- name: xxx
  debug: msg="{{aa[0]}}"
- name: xxx
  debug: msg="{{item}}"
  loop: aa

lookup password

每个用户创建随机密码，并保存密码,如果密码存在就不会更新

tasks:
- name: xxx
  vars:
    password: "{{lookup('password', 'abcdir/'+item+' length=22')}}"
  debug: msg="{{item}},{{password}}"
  loop: "{{query('lines', 'cat userlist')}}"

• 校验哈希值checksum

vars_files：
- verfiy_file.yaml
tasks:
- name: verfiy file
  vars: 
  - r1: "{{lookup('file',{{item.name}})|hash('sha1')}}"
  - r1: "{{item.checksum}}"
  assert:
    that:
    - r1 == r2
    fail_msg: "fail {{item.name}}"
    success_msg: "pass {{item.name}}"
  loop: "{{files}}"
  ignore_errors: yes

assert 用法

---
- name: this is for test
  hosts: localhost
  tasks:
  - name: print date
    vars:
      a: 1
      b: 2
    assert:
      that:
      - a == b
      success_msg: "equal"
      fail_msg: "not equal"